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Post-retirement Benefit Plans
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Post-retirement Benefit Plans Post-retirement Benefit Plans
The components of net periodic benefit cost for our defined benefit pension plans are as follows:
Three Months EndedNine Months Ended
 September 30,September 30,
(in millions)2025202420252024
Domestic defined benefit pension plans:
Service cost$1 $1 $2 $2 
Interest cost2 1 4 3 
Expected return on plan assets(1)(1)(4)(4)
Amortization of net actuarial loss— — 1 1 
Net periodic benefit cost$2 $1 $3 $2 
International defined benefit pension plans:
Service cost$2 $2 $7 $7 
Interest cost4 4 12 12 
Expected return on plan assets(3)(4)(9)(10)
Net periodic benefit cost$3 $2 $10 $9 
Total net periodic benefit cost$5 $3 $13 $11 
The components of net periodic benefit cost, other than the service cost component, are included in the line item "Other non-operating income, net" in the Condensed Consolidated Income Statements.
The total net periodic benefit cost for other post-retirement employee benefit plans was less than $1 million, including net credits recognized into "Other comprehensive income (loss)" of less than $1 million, for each of the three and nine months ended September 30, 2025 and 2024, respectively.
We contributed $18 million and $16 million to our defined benefit plans for the nine months ended September 30, 2025 and 2024, respectively. Additional contributions ranging between approximately $2 million and $6 million are expected to be made during the remainder of 2025.